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https://issues.apache.org/jira/browse/HADOOP-17752?focusedWorklogId=609661&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-609661
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ASF GitHub Bot logged work on HADOOP-17752:
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Author: ASF GitHub Bot
Created on: 10/Jun/21 11:49
Start Date: 10/Jun/21 11:49
Worklog Time Spent: 10m
Work Description: liangxs commented on pull request #3085:
URL: https://github.com/apache/hadoop/pull/3085#issuecomment-858553624
> ...
> I think this is ok, because configurations are not very frequently
reloaded.
>
For newly created conf, `Configuration#properties` is null, which will
trigger reload operation when access. So I think it is
not a problem.
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Issue Time Tracking
-------------------
Worklog Id: (was: 609661)
Time Spent: 1h 10m (was: 1h)
> Remove lock contention in REGISTRY of Configuration
> ---------------------------------------------------
>
> Key: HADOOP-17752
> URL: https://issues.apache.org/jira/browse/HADOOP-17752
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: common
> Reporter: Xuesen Liang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> Every Configuration instance is put into *Configuration#REGISTRY* by its
> constructor. This operation is guard by Configuration.class.
> REGISTRY is a *WeakHashMap*, which should be replaced by *ConcurrentHashMap*.
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